New process of separation and purification byproduct hydrogen in chlor-alkali plants

With the development of the world economy, the demand for clean energy, especially high purity hydrogen, is increasing rapidly. In the chlor-alkali industry there are much byproduct hydrogen. In this study, a new process for the preparation of high purity hydrogen has been developed by purifying byproduct hydrogen from chlor-alkali plants. Adsorbents with different properties are filled in classification to ensure that various impurity gases can be got rid of in one vessel at one time. The regeneration process using combined temperature swing adsorption (TSA) and pressure swing adsorption (PSA) is adopted to strengthen the regeneration effect. During the process of adsorbents regeneration, adsorbents are heated step by step which not only guarantees a good regeneration effect but also reduces the amount of regenerated gas. Our experiment shows a high separation efficiency of bypdroduct hydrogen is obtained by applying this new process and the purity of product hydrogen is more than 99.999%( volume fraction).